Which of the following statement(s) is/are correct? 1. Broad gauge railway engines-Varanasi. 2. Electric locomotives-Bhopal. 3. Integral Coach Factory-Calcutta. Which of the statement(s) is/are correct?

• A.  1 only                         
• B.  2 only
• C.  3 only                         
• D.  1, 2 and 3